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collocation support

Posted on Jan 10, 2007 at 12:19 PM 25 Views

Dear All,

Is there any collocation support in the Java EE5 server? I mean that I do not need to call the local interface directly to achieve better performance when the caller and the called (client-server) are on the same addrespace. I know that CORBA implementations support collocation:

http://www.research.ibm.com/Middleware2000/WiP_Papers/wang.pdf

http://www.fpx.de/fp/Uni/Diplom/node24.html

Thanks,

Zsolt

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  • author's profile photo Vladimir Pavlov
    Vladimir Pavlov
    Posted on Jan 10, 2007 at 01:00 PM
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    Hi Zsolt,

    Can you elaborate a bit?

    Are you talking about EJBs?

    Am I getting you right that you want to always call the remote interface and rely on the framework to automatically detect and replace that with a local invocation when the caller and the callee reside on the same server (JVM)?

    Best regards,

    Vladimir

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    • Adrian Goerler Former Member
      Jan 10, 2007 at 03:23 PM

      Hi Zsolt,

      on a local interface parameters are passed by reference wehereas on a remote interface parameters are passed by value (using (possible custom) serialization). These techniques are semantically different.

      The receiver of a parameter passed by value on a remote interface could rely on the fact that he receives a <i>copy</i> and can freely modify the parameter received.

      Therefore we cannot perform the suggested optimization, I am afrraid.

      Best regards,

      Adrian

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